Check engine light - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Go Back   GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat > GM Technical Discussion and Questions > General GM Chat

General GM Chat Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

LinkBack Thread Tools Search this Thread
Old 11-25-2008, 05:32 PM   #11
Senior Member
True Car Nut
Join Date: Sep 2002
Location: Chicago, IL
Posts: 2,409
Thanks: 0
Thanked 0 Times in 0 Posts
acg_ssei is on a distinguished road

Originally Posted by sbortoloni View Post
What'* the difference between service and check engine lights?
If I remember right, Check Engine is triggered by an ECM fault, and Service Engine Soon is triggered by a maintenance reminder program (and possibly also by a fault).

I noticed on a rental Olds Intrigue I was driving once that during startup, when the warning lights lit up for bulb prove-out, the Check Engine would come on _before_ the engine started, and the Service Engine Soon came on _after_ the engine started.
acg_ssei is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
1998 Catera - Check Engine Light, ABS Light and TC light on lucille2 Cadillac 2 02-10-2011 10:58 AM
Phantom Check Engine Light/Rough Engine/Coolant Temp. Gauge Whacky RWW2003 1992-1999 10 11-13-2009 07:00 AM
Check Gages-BRAKE light, trac off light, and Antilock light all on MissRockstar04 2000-2005 9 07-07-2009 04:12 PM
Engine miss, check engine light on - NO code mdrose64 1992-1999 12 07-16-2007 11:43 AM
Check engine light and traction off light on - hissing sound erics95se 1992-1999 11 04-08-2006 12:40 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 06:10 PM.